Valve.



0. E. HUNT. VALVE. APPLICATION FILED AUG. 11, 1908.

949,899. Patented Feb.22, 1910.

OSTMAN E. HUNT, 0F EAGLE GROVE, IOWA.

VALVE.

Specification of Letters Patent.

Application filed August 11, 1908.

Patented Feb. 22, 1910.

Serial No. 448,021.

1 '0 all whom it may concern:

Be it known that I, OSTMAN E. HUNT, citizen of the United States, residing at Eagle Grove, in the county of lVright and State of Iowa, have invented certain new and useful Improvements in Valves, of which the following is a specification.

This invention comprehends certain new and useful improvements in valves, and the object of the invention is a simple, durable and efiicient construction of a device of this character which is positive in action and is arranged to move entirely away from its seat when subjected to pressure, and is automatically returned to its valve seat and effectually held thereon, upon the removal of the pressure, and which is thus particularly adapted for use as a foot valve for pumps, although it is to be understood that it is not limited to any such use, but may be employed in any connection where a valve of this character may be advantageously applied.

With this and other objects in View that will more fully appear as the description proceeds, the invention consists in certain constructions and arrangements of the parts that I shall hereinafter fully describe, and then point out the novel features thereof in the appended claim.

For a full understanding of the invention and the merits thereof, and to acquire a knowledge of the details of construction, reference is to be had to the following description and accompanying drawing, in which:

Figure 1 is a longitudinal section of a valve constructed in accordance with my in vention; and, Fig. 2 is a perspective view thereof, with the upper section of the casing removed. Fig. 3 is a view illustrating another embodiment of the invention, hereinafter specifically described.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawing, by the same reference characters.

My improved valve is preferably mounted in a casing that is constructed in upper and lower sections 1 and 2, the latter or lower section being provided with the valve seat and being in the form of a strainer, the bottom of which is susceptible of convenient detachment to facilitate the removal of any rubbish possibly accumulating in the strainer. The upper section 1 of the casing has a flanged connection with the lower section 2, and is arranged for communication with the receptacle into which the desired liquid is to be introduced, and which, when the valve is employed as a foot valve, as in the present instance, is the pump cylinder.

The valve seat comprises a ring 3 that is preferably exteriorly threaded, as shown, in order to be removably mounted within the lower section 2, and a hub t centrally disposed within the ring and terminating flush with the upper edge thereof, said hub portion being secured within the ring by a single relatively narrow diametrical rib 5. The hub is designed to support the valve stem 6, and for this purpose is preferably formed with a centrally disposed threaded bore 7 into which the threaded lower end of the valve stem screws, said valve stem projecting vertically upwardly from the plane of the valve seat, and terminating at its upper end in a laterally enlarged head 8.

9 designates the valve proper which, in the present instance, is formed of a disk of rubber or other material susceptible of forming a water-tight joint with the valve seat when pressed thereagainst, said valve disk being formed with a central perforation by means of which it is loosely mounted upon the valve stem 6. Attention is particularly directed to the fact that the diametrical rib 5 is recessed between the hub and the ring, in its edge adjacent to the valve disk (see Fig. 1), whereby to expose a greater area of the valve disk to the pressure of the water and insure of the more positive action of the valve. In order to normally hold the valve disk upon its seat, I employ a suitable spiral spring 10 which encircles the valve stem with one end terminating contiguous to and abutting against the head 8 and with its other end seated in a recess 11 formed in the upper face of a washer 12 which is also loosely mounted upon the valve stem and is held by the spring in superposed relation to the valve disk, as shown.

In the practical use of my improved valve, it will be evident that when a vacuum is created in the pump cylinder, the difference in pressure upon the two sides of the valve will cause the latter to move upwardly away from its seat and against the compression of the spring 10, and permit the water or other liquid to be drawn through such seat by the suction, after passing through the strainer to be freed of any rubbish possibly contained therein. hen the vacuum in the pump cylinder becomes. filled, equal pressure will be established upon both sides of the valve disk, and the latter will manifestly be moved downwardly by the expansion of the spring to assume a position against its valve seat and to be held effectually thereon, so as to prevent the liability of the liquid lea-king through the same.

Attention is here called to the fact that a washer or gasket 4 is interposed between the flanges 5 of the upper and lower casing sections, the inner edge of which projects partially across the ring 3 of the valve-seat for contact with the peripheral edge of the valve 9, thus to assist in centering the valve on its seat, while at the same time preventing leakage at the junction of the casing sections, and at the threaded walls of said valve-seat.

From the above description, in connection with the accompanying drawing, it will be apparent that I have provided an improved valve construction which is positive in action and is susceptible of various uses, which consists of comparatively few parts that may be readily assembled during the initial construction of the valve, and may be quickly separated or removed to permit the cleaning of the parts or their replacement by new parts, and which may be easily and cheaply manufactured so as to be placed upon the market at a price not too great to prevent its general adoption.

Another embodiment of the invention is clearly illustrated in Fig. 3, the flange connection between the sections of the casing is omitted and the same are interiorly threaded and coupled together by the exteriorly threaded valve seat, the sections in this case being preferably arranged for engagement by a wrench so as to be susceptible of convenient removal.

It has been found in practice that when the valve is employed in an upright position, the spring 10 may be discarded as the pressure of the water already passed through the valve, together with the force of gravity, serves to normally hold the valve disk upon the valve seat to close the same.

Having thus described the invention, what I claim is:

A pump valve including a casing formed of mating sections having laterally extending flanges, one of said casing sections being perforated and the other provided with interior threads for connection with a pump cylinder, said perforated casing section being provided with an annular seating recess, a valve-seat threaded in said recess and having its upper surface disposed flush with the upper face of the flange of the perforated casing section, a valve-stem rigidly secured to the valve-seat, a valve slidably mounted on the stem and normally yieldably engaging said seat, a gasket interposed between the flanges of the casing sections and having its inner edge extending partially across the valve-seat at said recess for contact with the peripheral edge of the valve and fastening devices piercing the gasket and flanges of the casing sections for securing said sections in assembled position.

In testimony whereof I afliX my signature in presence of two witnesses.

OSTLWIAN E. HUNT. 

